Method and arrangement for operating gas discharge lamp

Abstract

A method of and a device for operating a gas discharge lamp which is fed with an alternating voltage or an alternating current and wherein the instantaneous power of the lamp is increased at given time intervals are used to form the electrodes. The value of an operational datum of the lamp which varies in time is continuously or discontinuously measured and the frequency of the alternating voltage or the alternating current (operating frequency) is selected in dependence on the measured values.

Description

Method and apparatus for operating a gas discharge lamp technical field The invention relates to a method and a device for operating a gas discharge lamp, wherein the gas discharge lamp is supplied with an alternating voltage or an alternating current, the instantaneous power of the lamp being increased (pulse mode operation) at given time intervals. The invention also relates to a device equipped with such a lamp and device, and also to a method of handling electrodes, wherein the operation of the electrodes is based on said mode. Background technique Such modes of operation and apparatus are described, for example, from WO 96 / 14724 or US 5,608,294. The cited WO patent document discloses a device having a power supply circuit for operating a gas discharge lamp, the power supply circuit supplying an alternating voltage or alternating current of a predetermined period, delivering a predetermined amount of power to the gas discharge lamp in such a way that That is, when the...

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Problems solved by technology

A further problem, which is very difficult to solve, is caused by the geometry of the electrodes themselves

It is assumed that the desired electrode geometry can be cut from solid metal, but for cost reasons the electrode preferably consists of an electrode rod (tungsten wire) with the tungsten helically flexed, although ultimately the geometry of the electrode for heat dissipation and internal structure, can be controlled, but less has been proposed in this regard

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